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Massachusetts Journeyman Pipefitter Exam
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Massachusetts Journeyman Pipefitter Exam
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Massachusetts Journeyman Pipefitter Exam (Heating,Cooling) PJ-01 (Questions with 100% correct answers)
Existing Work - ANSWER A plumbing system or any part thereof installed prior to
March 11, 2005.
Soil Pipe - ANSWER Any pipe that conveys the discharge of toilets, urinals or
fixtures having similar functions to the building drain or building sewer. The
discharge may be conveyed with or without the discharge from other fixtures
Water Distribution Pipe - ANSWER A pipe within the building or on the premises
that conveys water from the water service pipe to the point of usage
Barometric Loop. - ANSWER A vertical loop of pipe, rising to a height sufficient to
prevent back-siphonage from occurring in the potable water supply pipe.
(Approximately 35 feet, depending on the weight of the atmosphere.)
Developed Length - ANSWER The length of a pipeline as measured along the
center line of the pipe or fittings.
Roughing-in. - ANSWER The installation of all parts of the plumbing system that
can be completed prior to the installation of fixtures. This includes drainage piping,
water supply piping, vent piping, the necessary fixture supports, and any fixtures that
are built into the building.
Trap Seal - ANSWER The vertical distance between the crown weir and the top of
the dip of the trap.
Air Gap (Drainage System). - ANSWER The unobstructed vertical distance through
the free atmosphere between the outlet of a waste pipe and the flood level rim of the
receptacle into which the waste discharges.
Air
Fixture Unit. - ANSWER A unit of liquid flow used in sizing both supply and
drainage pipes. It is equal to 1 cubic foot per minute or approximately 7.5 gallons per
minute.
Liquid Waste - ANSWER Discharge from any fixture, appliance, area or
appurtenance that does not contain human or animal waste matter suspended in a
solution.
Vacuum - ANSWER Any pressure less than that exerted by the atmosphere
Branch Interval - ANSWER A distance along a soil or waste stack corresponding in
general to a story height, but not less than eight feet in vertical height, and wherein
the horizontal branches from one floor or story of a building are connected to the
stack
,Testing water supply shall be at a pressure no less than? - ANSWER 125 PSI
Storm or Sanitary drains shall be installed at a slope that: - ANSWER a slope that
produces a computed velocity of discharge of not less than two feet per second.
Horizontal drainage piping which is (3) three inches in diameter or smaller shall be
installed with a minimum uniform pitch - ANSWER ¼ inch per foot
Horizontal drainage piping which is larger than three inches in diameter shall be
installed with a minimum uniform pitch of - ANSWER 1/8 inch per foot
Special Labs. All licensed plumbers and plumbing apprentices installing pipe
connections or working on drains to hospital waste and vent systems, mortuary
waste and vent systems, laboratory waste and vent systems, dental waste and vent
systems and plumbing systems in radioactive sensitive areas - ANSWER shall
have the surface of their body and clothing protected by disposable or washable
gowns similar or equal to the gowns, gloves and face masks worn by surgical staff.
Whenever there is reason to believe that the plumbing system of any building has
become defective, it shall be subjected - ANSWER test and/or inspection, and any
defects found shall be corrected as required in writing by the Inspector
Waste and Vent shall be tested for? - ANSWER until there is a uniform gauge
pressure of five P.S.I.G. or sufficient pressure to balance a column of mercury ten
inches in height. This pressure shall be held without introduction of additional air for
a period of at least 15 minutes. The gauge used for this test shall be calibrated in
increments no greater than 1/10 of a pound. c
Upon completion of a section or of the entire water supply system when roughed, it
shall be tested and proved tight under a pressure not less than - ANSWER 125
pounds per square inch
Upon notice of a request for an Inspection of the rough plumbing, the Inspector shall
make the Inspection within - ANSWER two working days after receipt of such notice
Two acceptable tests for Drain and Waste - ANSWER Peppermint Test and Air
Test
Quarter bends, or their equivalent may be used in soil and waste lines when the
change in the direction of the flow is from the - ANSWER horizontal to the vertical.
Short sweep fittings may be used in a branch waste line when the waste line serves
only - ANSWER one outlet and cleanouts are provided.
List 3 Prohibited Fittings - ANSWER -No fitting that incorporates a straight T branch
shall be used as a drainage fitting.
- No running threads, bands or saddles shall be used in a drainage system.
-A fitting commonly referred to as a "Sisson Joint" is prohibited
, A dead end may be used to? - ANSWER Extend the cleanout.
Where trenches are excavated below grade such that the bottom of the trench does
not form the bed for the pipe, the trench shall be? - ANSWER back-filled to grade
with sand tamped in place so as to provide a uniform bearing surface for the pipe
between joints.
Where rock is encountered in trenching, The rock shall be removed to a point -
ANSWER at least three inches below the grade line of the trench and the trench
shall be backfilled to grade with sand tamped in place so as to provide a uniform
bearing for the pipe between joints; and b. care shall be exercised to ensure that no
portion of the pipe, including its joints, rests on any portion of a rock
Backfilling. 1. Until the crown of the pipe is covered by at lest____________ feet of
tamped earth considerable care shall be exercised in backfilling trenches - ANSWER
two feet
When are deviations from the plumbing code permited? - ANSWER -Existing
buildings for repair or remodel work
-Inspectors permission prior to the start of the job
-They are necessary and conform to the intent of the code
If a plumbing inspector finds code violations in any existing plumbing or gas system
that may cause a health or safety hazard the inspector shall...? - ANSWER Notify
the owner or his or her agent.
List two requirements when demolishing a building? - ANSWER 1. You must
secure a plumbing permit
2. Must make all connections gas and water tight.
Storm or sanitary drains shall be installed at a slope that produces a computed
velocity of discharge of not less than - ANSWER two feet per second
What fitting could you legally install that the branch is larger than the main? -
ANSWER 4x3 closet bend (The enlargement of a three-inch closet bend or stub to
four inches shall not be considered an obstruction).
Trenching, Tunneling and Back-filling Where rock is encountered in trenching -
ANSWER The rock shall be removed to a point at least three inches below the
grade line of the trench
Where trenches are excavated below grade such that the bottom of the trench does
not form the bed for the pipe - ANSWER the trench shall be back-filled to grade
with sand tamped in place so as to provide a uniform bearing surface for the pipe
between joints.
Backfilling. 1. Until the crown of the pipe is covered by at - ANSWER at least two
feet of tamped earth considerable care shall be exercised in backfilling trenches
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